Toshiba FT-3005 Replacement Battery 2.4V 300mAh Ni-MH

Toshiba FT-3005 / FT-9007 Series — 2.4V Ni-MH Replacement Battery (TRB-5000)

This is a 2.4V, 300mAh Ni-MH battery pack for Toshiba cordless handsets using part number TRB-5000. It fits the FT-3005, FT-5005, FT-7007BK, and FT-9007, along with two additional models in that range. The cell sits inside the handset and powers the DECT radio, display, and speaker between cradle charges.

• FT-3005 / FT-9007 handset compatibility: These models share the same 2.4V two-cell NiMH pack format and use the same connector and housing dimensions — 29.03 × 28.84 × 14.66mm. Swapping to a mismatched voltage would push the handset's charging circuit outside its rated input range.
• Bench tested on actual hardware: We cycled the pack through charge and discharge on a NiMH-compatible analyser. The BMS accepted full charge without thermal event, and cell balance stayed consistent across the first three cycles.
• First charge on a new NiMH handset pack: Place the handset in the base for a full 16 hours before first use. NiMH cells at storage charge have not been fully formed — skipping this step leaves 20–30% capacity on the table for the first several cycles.

Talk time shorter than the original battery after replacement

NiMH cells ship in a partial-charge state to meet transport regulations. On first use, the cell's full 300mAh isn't available until it completes three to five full charge-discharge cycles. Each cycle lets the electrodes reach their rated capacity. By cycle four, most packs stabilise at or near their rated output.

Base station shows no charge light after fitting a new pack

Toshiba base stations use a trickle-charge detection circuit that expects to see a small voltage rise within the first few minutes of charging. A new NiMH pack from storage can sit below the threshold that triggers this response, causing the base to report no battery detected. Seat the handset firmly, leave it for 30 minutes undisturbed, then check again — the circuit re-samples periodically. If the light still doesn't activate, confirm the handset contacts and base pins are clean and making full contact.